【简答题】以正十八烷为内标,分析燕麦敌1号样品中燕麦敌含量,称取样品8.12g,加入内标物1.88g,测得燕麦敌及正十八烷的峰面积分别为68.0和87.0,已知燕麦敌以正十八烷为基准的相对应答值为0.417。求样品中燕麦敌的百分含量。
【判断题】American people believe that the human nature is good and they think the law is just a supplementary tool for the society .
【简答题】I used to believe in the American dream that meant a job,credit and success. I wanted it and worked toward it like everyone else, all of us separately chasing the same thing. One year, through a serie...
【判断题】精确测定控制点的平面坐标的工作称为平面控制测量。该表述
【多选题】已知某正弦交流电压为u =311cos(100πt —π/6 )V ,该电压的最大值、周期和初相位各为( )。
【判断题】精确测定控制点的平面坐标的工作称为平面控制测量
【单选题】以正十八烷为内标,分析燕麦敌1号样品中燕麦敌含量,称取样品8.12g,加入内标物1.88g ,测得燕麦敌含量及内标物的峰面积分别为68.0mm2和87.0mm2,已知燕麦敌以正十八烷为基准的相对校正因子为0.417。求样品中燕麦敌的百分含量。